Sorry, but you're not understanding the sheer breadth of what you're asking. I am stating that a corporation the size of Apple is incapable of doing it. No one is capable of it. The USPTO itself is incapable of it.
There are just way too many patents filed and valid, in filing, with so many claims, worded in legalese no engineer can understand about applications no lawyers can understand.
It would litterally add years to product development lifecycle to do it. Much easier to cross your fingers and when a patent holder comes forward, negotiate his claims with him and weight whether it is cheaper to license or litigate.
And you know what ? That's precisely how businesses operate these days, because that's the most sensible thing to do if you ever want to get to market with something.
It results in a few "oops", like with Apple's visual voice mail or other examples where they have been "caught" infringing patents. It also results in a few companies getting licensing fees for non-infringing products because in the end it was cheaper to license than litigate.
Industry associations, patent pools, for standard-essential patents over standardized technologies try to make this easier for players. But those patents are usually not what is at issue, it's all the patents you don't know about that are, the ones where you'd have to go over all the patents in the USPTO's database in order to find them.
Then there's the fact that the US is but 1 country...